51. The TRAP is one of the interrupts available in INTEL 8085. Which one of the following statements is true of TRAP?

1. 1. It is level triggered

   
   
   

   2. It is negative edge triggered

   
   
   

   3. It is positive edge triggered

   
   
   

   4. It is both positive edge triggered and level triggered

   
   
   

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   NA

   Correct Option: D

   NA

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52. A personal computer has typically
    

1. 1. 5 to 10 kilobytes of main memory

   
   
   

   2. 10 to 100 kilobytes of main memory

   
   
   

   3. 100 to 256 kilobytes of main memory

   
   
   

   4. 256 kilobytes to 1 megabyte of main memory.

   
   
   

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   NA

   Correct Option: D

   NA

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53. Consider the following set of instructions:
    STC
    CMC
    MOV A,B
    RAL
    MOV B,A
    This set of instructions
    

1. 1. doubles the number in Register by B

   
   
   

   2. divides the number in Register by 2

   
   
   

   3. multiples B by A

   
   
   

   4. adds A and B

   
   
   

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   NA

   Correct Option: B

   NA

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54. The larger the RAM of a computer, the faster is its speed, since it eliminates
    

1. 1. need for ROM

   
   
   

   2. need for external memory

   
   
   

   3. frequent disk I/Os

   
   
   

   4. need for a data-wide path

   
   
   

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   NA

   Correct Option: C

   NA

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55. In a 8085 microprocessor, the following sequence of instructions is executed:
    STC
    CMC
    MOVE A,B
    RAL
    MOVE B,A
    After the last instruction, the output will

1. 1. rotate the contents of the accumulator and store it in B

   
   
   

   2. get the contents of B register into accumulator and rotate it to left by one bit

   
   
   

   3. double contents of B register

   
   
   

   4. manipulate carry in A and B

   
   
   

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   NA

   Correct Option: C

   NA

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